抽样法

Methods (1) Randomized stratified clustered sampling method was used.

(1)采用分层整群随机抽样法，收集徐州市

Methods: The study used a systematic sample of 3,407 physicians selected from among 10,223 primary care physicians registered in the Department of Health in April 2002. A survey was mailed to collect applicable data. Five-hundred and twelve questionnaires were returned, for a response rate of 15.1%.

本研究以2002年4月在行政院卫生署医政处登记执业的10，223位基层开业医师为研究对象，采用系统抽样法，共得到3，407位，以邮寄问卷的方式搜集所需的资料，回收512份，回收率为15.1%。

Then the corrected average hearing threshold of 0.5 kHz, 1 kHz, 2 kHz, 4 kHz and the average hearing threshold of 1 kHz,2 kHz,4 kHz were compared for analyzing the impact of their differences on hearing grades.

为了达成一致，我们在实际操作中对0.5k Hz听阈值进行了修正，对0.5kHz听阈值在计算平均听阈值时的影响进行了分析，结果报告如下。1对象和方法1.1样本和对象以2001年《贵州省年鉴》人口统计数据为基准，按容量比例概率抽样法

In ecology, line transect survey is one of the most widely used method to assess the biomass density.

中文摘要在生态学中估计生物数量密度时，线上穿越抽样法是一种常用的方法。

Methods A two stage cluster sampling method was adopted to determine the number of entertainment places and CSW. The blood samples testing HIV and syphilis were collected.

采用两阶段整群抽样法确定抽样调查场所和调查人数，并采集血标本检测HIV、梅毒。

Their weight, height, blood pressure and vital capacity were calculated.

采用分层随机整群抽样法选择张家口市7～12周岁3 043名儿童，分别测定身高、体重、血压和肺活量，计算体质量指数和肺活量指数。

Methods: The target population comprised 3 age groups (60~70, 71~80, and above 81 years) randomly selected in the region of Suzhou. Data were collected using questionnaire, physical examination and audiometric and blood pressure, glucose are measured.

用随机抽样法对苏州地区部分60岁以上老年人进行问卷调查，测血压，血糖，行耳部检查及测听检查，所得资料用SPSS10.0统计软件进行处理。

Methods A total of 986 recruits finished a self administered questionnaire,Egma Minnen av Bardndosnauppforstran, Adolescent Self Rating Life Events Check List and EPQ. Everyone who had suicidal attempt was interviewed.

采用多级整群抽样法随机抽取某部986名新兵，采用自编调查问卷、父母教养方式问卷、青少年生活事件量表和艾森克个性问卷进行调查。

However, in the simulation, we found that the equilibrium between growing radicals and nitroxyl radicals was a CPU-intensive and time-consuming process, therefore, a hybrid algorithm with an analytical expression for the exchange equilibrium and with a biased sampling technique for those elementary reactions of small probabilities was used to improve the stochastic algorithm.

并发现，链自由基与氮氧游离基之间的偶合-解离平衡消耗大量的运算时间，为此用偏倚抽样法和杂化运算对模拟进行了改进，得到了与原始方法基本一致的结果，从而大大缩短了运算时间。

In July 2006, the diurnal activity rhythms of 13 heads of captive Qinling golden takin were observed in Shaanxi Provincial Centre for the Breeding and Conservation of Rare Wildlife at daylight (from 9:00 am to 4:00 pm in July). The behavioral ethnogram was identified through observation at the sampling site, with the behaviors of golden takin recorded at 5 min interval using instantaneous scannable sampling method.

2006年7月，在陕西省珍稀野生动物抢救饲养研究中心内采用瞬时扫描取样和全事件抽样法对13头圈养秦岭羚牛的昼间(自早09：00至下午04：00)活动规律进行了观察。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。